U.S. patent application number 16/305494 was filed with the patent office on 2019-07-04 for testing system for testing the rolling resistance of at least one vehicle tire and method for testing the rolling resistance of .
The applicant listed for this patent is ZF Friedrichshafen AG. Invention is credited to Roland BOSL, Jens EISENBEISS, Wolfgang SAXINGER.
Application Number | 20190204185 16/305494 |
Document ID | / |
Family ID | 58640879 |
Filed Date | 2019-07-04 |
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United States Patent
Application |
20190204185 |
Kind Code |
A1 |
BOSL; Roland ; et
al. |
July 4, 2019 |
TESTING SYSTEM FOR TESTING THE ROLLING RESISTANCE OF AT LEAST ONE
VEHICLE TIRE AND METHOD FOR TESTING THE ROLLING RESISTANCE OF THE
VEHICLE TIRE
Abstract
A test system for testing a rolling resistance of a vehicle
tire, with a measurement device. The measurement device has a load
device that includes a load roller which applies a test load on the
tire. The measurement device has a receiving device which receives
the tire. The receiving device and the load device can be moved
relative to one another. The measurement device has a drive device
which rotationally drives at least one of the load roller and the
receiving device. The measurement device has at least one test
configuration for measuring the rolling resistance. The receiving
device has first and second rim elements that together form a split
rim engagement unit for accommodating the tire.
Inventors: |
BOSL; Roland; (Neuburg am
Inn, DE) ; SAXINGER; Wolfgang; (Thyrnau, DE) ;
EISENBEISS; Jens; (Fuerstenzell, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ZF Friedrichshafen AG |
Friedrichshafen |
|
DE |
|
|
Family ID: |
58640879 |
Appl. No.: |
16/305494 |
Filed: |
April 27, 2017 |
PCT Filed: |
April 27, 2017 |
PCT NO: |
PCT/EP2017/060001 |
371 Date: |
November 29, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G01M 17/022
20130101 |
International
Class: |
G01M 17/02 20060101
G01M017/02 |
Foreign Application Data
Date |
Code |
Application Number |
May 30, 2016 |
DE |
10 2016 209 325.8 |
Claims
1-21. (canceled)
22. A test system (25) for testing a rolling resistance of at least
one vehicle tire (13) with a measuring device (6), the measuring
device (6) having a load device (7), the load device (7) having a
load roller (8) which applies a test load on the vehicle tire (13),
and the load roller (8) defining a first rotational axis (R1), the
measuring device (6) having a receiving device (12) which receives
the vehicle tire (13), the receiving device (12) and the load
device (7) being movable relative to one another, and the receiving
device (12) defines a second rotational axis (R2), the measurement
device (6) having at least one drive device (10a, 10b), and the at
least one drive device (10a, 10b) rotationally driving at least one
of the load roller (8) and the receiving device (12), the
measurement device (6) having at least one measurement
configuration for measuring the rolling resistance, and the
receiving device (12) having first and second rim elements (20a,
20b), and the first and the second rim elements (20a, 20b) form a
split rim engagement unit for accommodating the vehicle tire
(13).
23. The test system according to claim 22, wherein the first rim
element (20a) is a first rim half, and the second rim element (20b)
is a second rim half, and the first and the second rim halves
together form a measurement rim as the split rim engagement
unit.
24. The test system (25) according to claim 22, wherein at least
one of the first and the second rim elements (20a, 20b) is axially
movable relative to the second rotational axis (R2), and the first
rim element (20a), in a mounting position, is separated from the
second rim element (20b).
25. The test system (25) according to claim 22, wherein the
receiving device has a rim width adjustment device which adjusts a
rim width of the receiving device (12).
26. The test system according to claim 22, wherein the measurement
configuration has at least one force detection device (22a, 22b)
for measuring a wheel contact force, and the force detection device
(22a, 22b) is connected to at least one of the receiving device
(12) and the load device (7).
27. The test system (25) according to claim 26, wherein the
measurement configuration has at least one further force detection
device which measures a tangential force, and the further force
detection device is connected to at least one of the receiving
device (12) and the load device (7).
28. The test system (25) according to claim 22, wherein the
measuring configuration has at least one torque detecting device
which measures a torque, and the torque measuring device is
connected to at least one of the receiving device (12) and the load
device (7).
29. The test system (25) according to claim 22, wherein the
measuring device (6) has first and second drive devices (10a, 10b),
and the first drive device rotationally driving the load roller (8)
and the second drive device rotationally driving the receiving
device (12).
30. The test system (25) according to claim 22, wherein the
measurement device (6) has at least one positioning device (23)
which tilts at least one of: the second rotational axis (R2)
relative to the first rotational axis (R1), and/or the first
rotational axis (R1) relative to the second rotational axis
(R2).
31. The test system (25) according to claim 22, wherein the
measurement device (6) has at least one assembly device (11), and
the assembly device (11) has at least one actuating module (18)
which locks the rim engagement unit.
32. The test system (25) according to claim 31, wherein the
mounting device (11) has at least one bead breaking module (19)
which separates the vehicle tire (13) from either the first or the
second rim element (20a, 20b).
33. The test system (25) according to claim 22, wherein the
receiving device (12) has a filling unit which fills the vehicle
tire with compressed air.
34. The test system (25) according to claim 33, wherein the filling
unit has a control module which controls air pressure in the
vehicle tire during a measurement process of the vehicle tire.
35. The test system (25) according to claim 22, wherein the load
unit (7) has a load slider (9), the load roller (8) is rotatably
supported in the load slider (9), and the load slider (9) is
displaceable in a direction of the receiving device (12).
36. The test system (25) according to claim 22, wherein the test
system (25) has a storage device (2) which accommodates at least
one further vehicle tire, and the storage device (2) forms a buffer
storage for the at least one further vehicle tire.
37. The test system (25) according to claim 22, wherein the test
system (25) has an input interface (28a) and an output interface
(28b), the input interface (28a) is designed for loading the at
least one vehicle tire (13) into the test system and the output
interface (28b) is designed for removing the at least one vehicle
tire (13) from the test system, the test system (25) is designed
for at least one of fully automatic testing and automated testing
of the at least one vehicle tire (13) between the input and the
output interfaces (28a, 28b).
38. The test system (25) according to claim 37, wherein the test
system (25) has at least one of: a pre-centering device (4) for
defined positioning of the at least one vehicle tire (13), and/or a
soaping device (5) which moistens a tire bead of the vehicle tire
with a soap solution, the at least one of the pre-centering device
(4) and the soaping device (5) is positioned between the input
interface (28a) and the output interface (28b).
39. The test system according to claim 37, wherein the test system
(25) has at least one conveyor device which transports the vehicle
tire (13), and the conveyor device connects the input interface
(28a) and the output interface (28b) with one another.
40. The test system (25) according to claim 37, wherein the input
interface (28a) is formed by a tire storage device (2) and the
output interface (28b) is formed by at least one of the measurement
device (6) and a conveyor device.
41. The test system (25) according to claim 22, wherein the test
system (25) has a test chamber (26) and a temperature adjustment
device, at least one of a tire storage device (2), a pre-centering
device (4), a soaping device (5) and the measuring device (6) is
positioned within the test chamber (26), and a temperature of the
test chamber (26) is adjustable by the temperature adjustment
device.
42. A method of testing a rolling resistance of at least one
vehicle tire (13) with a test system (25) having a measuring device
(6) that has a load device (7), the load device (7) having a load
roller (8) which applies a test load on the vehicle tire (13) and
defines a first rotational axis (R1), the measuring device (6)
having a receiving device (12) which receives the vehicle tire
(13), the receiving device (12) and the load device (7) being
movable towards one another, the receiving device (12) defines a
second rotational axis (R2), the measurement device (6) having at
least one drive device (10a, 10b) that rotationally drives at least
one of the load roller (8) and the receiving device (12), the
measurement device (6) having at least one measurement
configuration which measures the rolling resistance, and the
receiving device (12) having first and second rim elements (20a,
20b) that form a split rim engagement unit, the method comprising:
accommodating the vehicle tire (13) on the divided rim engagement
unit; and testing the vehicle tire (13).
Description
[0001] This application is a National Stage completion of
PCT/EP2017/060001 filed Apr. 27, 2017, which claims priority from
German patent application serial no. 10 2016 209 325.8 filed May
30, 2016.
FIELD OF THE INVENTION
[0002] The invention concerns a test system for testing the rolling
resistance of at least one vehicle tire. Also, the invention
concerns a method for testing the rolling resistance of at least
one vehicle tire by using the test system.
BACKGROUND OF THE INVENTION
[0003] Often, laboratory machines are used for the quality control
of the tire rolling resistance values. These machines are manually
loaded, whereby a tire needs to be mounted on a rim and thereafter,
for instance with wheel bolts, be connected with the laboratory
machine. After finishing the test, the tire needs to be manually
removed and thereafter be separated from the rim.
[0004] The publication EP 2 793 013 B1, which most likely
represents the closest state of the technology, describes a service
device for motor vehicles wheels, in particular a balancing machine
or tire changing machine. The service device comprises a mounting
means provided to rotatably receive a tire/rim configuration
including a tire and a rim. In addition, the service device
comprises a load means for applying a predetermined load at a
perimeter of the tire/rim configuration, as well as first drive
means provided to move the mounting means and the load means
relative to each other, wherein secondary drive means are provided
which make the tire/rim configuration rotate when these are engaged
by the load means. A sensor configuration is provided to determine
forces which act between the circumferential surface and the load
means, wherein the forces include at least a first force which acts
in the radial direction at the tire/rim configuration, and a second
force which acts towards a perimeter direction of the tire/rim
configuration. Also, an evaluation device is positioned, which
determines a first rolling resistance coefficient of the tire on
the basis of the first and the second force, which are detected by
the sensor configuration.
SUMMARY OF THE INVENTION
[0005] The object of the present invention is to propose a test
system for testing of the rolling resistance of at least one
vehicle tire, which accelerates the entire testing process. The
object is achieved with a test system with the characteristics of
the independent claims, as well as with a method with the
characteristics of the independent claims.
[0006] Preferred and advantageous embodiments of the invention
result from the dependent claims, the following description, and/or
the attached drawings.
[0007] In accordance with the invention, a test system is proposed
for the testing of a rolling resistance of a vehicle tire. In
particular, the function of the test system is to determine the
rolling resistance of a vehicle tire on the basis of, in
particular, at least one, preferably two detected measurement
variables. In particular, the test system is a test stand or a test
cell, whereby the test system represents, for instance a part or
partial section, respectively, of an assembly or production line.
For instance, the vehicle tire is an automobile tire or a motorbike
tire, or a truck tire, whereby the vehicle tire is made from an
elastic material, preferably from rubber.
[0008] The test system comprises a measurement device. The
measurement device has the function of simulating in particular an
operating condition of the vehicle tire. For instance, the
measurement device is a partial section of the test system or forms
the test system.
[0009] In addition, the measurement device has a load device. The
load device has a load roller to create a test load on the vehicle
tire. Hereby and in particular, the vehicle tire is acted upon by
the load device with at least one force. Preferably, the force is
equal to the force of weight of a vehicle or the vertical wheel
force, respectively. Preferably, vehicle tire is acted upon with a
load of at least 0.1 t, preferably more than 0.5 t, especially
preferably with more than 2 t, and specially with more than 30 t.
Alternatively or optionally and in addition, the vehicle tire is
subjected to a load of less than 100 t, preferably less than 20 t,
especially preferably less than 5 t, in particular less than 1.5 t.
The load roller defines a first rotational axis. In particular, the
load roller is mounted coaxially with the first rotational
axis.
[0010] Also, the measurement device has a receiving device to
accommodate the vehicle tire. In particular, the receiving device
is rotatably mounted. Preferably, the vehicle tire with the
receiving device is positively and/or non-positively and/or
frictionally engaged, particularly preferably rotationally fixed
and/or connectable.
[0011] The receiving device and the load device can be moved
relative to each other. In particular, the receiving device can be
moved in the direction of the load device and/or the load device in
the direction of the receiving device, so that preferably the
vehicle tire, in particular the perimeter surface of the tire, is
in or can be brought into contact with the load roller, in
particular a cylinder shell surface of the load roller. The
receiving device defines a second rotational axis. In particular,
the second rotational axis forms a line parallel to the first
rotational axis. Preferably, the receiving device is mounted
coaxially with the second rotational axis. In particular, the
vehicle tire can be acted upon by means of the load device with a
force which acts radially in the direction of the second rotational
axis.
[0012] The test device has at least a drive device, whereby the
drive device rotationally drives the load roller and/or the
receiving device. In particular, the drive device is connected with
the load roller and/or the receiving device by transmission
technology. Preferably, the load roller and the receiving device
are brought into rotational movement when the load roller makes
contact with the vehicle tire. In particular, the drive device is
an electrical motor, whereby the electric motor creates a torque.
In particular the drive device sets the load roller in a rotational
movement in the circumferential direction with respect to the first
rotational axis and/or the vehicle tire, or the receiving device,
respectively, in a rotational movement in the direction of rotation
with respect to the second rotational axis.
[0013] The test device has at least a measuring arrangement for
measuring the rolling resistance. In particular, the test device
has the function to calculate the rolling resistance from at least
one detected measurement value. In particular, the test device
comprises an evaluation configuration which calculates the rolling
resistance of a vehicle tire from at least one, preferably two,
especially preferably from at least three detected measurement
values.
[0014] It is proposed in the framework of the invention that the
receiving device has at least a first and a second rim element,
wherein the first and the second rim element create a split rim
engagement device for receiving the vehicle tire. In particular,
the function of the receiving device is to accommodate the vehicle
tire between the first and the second rim element so that
preferably the two rim elements fix the tire and that it, for
instance, can roll on the load roller. In particular, the reception
of the vehicle tire takes place automatically.
[0015] Through the test system, in accordance with the invention, a
vehicle tire to be tested does not need to be mounted on a rim or
be removed, respectively, from a rim, whereby a complete, manual
mounting process is eliminated and thus, the testing process for
the determination of the rolling resistance can be significantly
accelerated. Also, a tire which was already installed on a rim is
not new anymore and thus, cannot be sold as a new tire. Because of
the split-rim engagement system, the tires are gently being
received by the rim elements, whereby the vehicle tires are exposed
significantly to lesser loads, so that resulting damages, which in
particular affect the test values, are significantly reduced.
[0016] In a preferred embodiment of the invention, the first rim
element is a first rim half and the second rim element a second rim
half, wherein the two rim halves together form a test rim has a rim
closing unit. In particular, the first and/or the second rim half
have a bearing on a measurement spindle, whereby the measurement
spindle extends axially in reference to the second rotational axis.
Especially preferred, the first and/or the second measurement rim
are positioned or can be positioned coaxially and/or concentrically
in reference to the measurement rim or the second rotational axis,
respectively. In particular, the two rim halves are
mirror-symmetrically positioned and can be separated from each
other. In particular, the second rim half is fixedly connected with
the measurement spindle, and/or interlocking, and/or material
locking, and/or friction locking connection, so that torque can be
transferred on the measurement spindle to the second rim half or
that eight or from the second rim half can be transferred to the
measurement spindle. In particular, the two rim halves are
separated by a sectional plane, whereby the sectional plane is a
radial plane in reference to the second rotational axis.
[0017] In an additional, preferred embodiment at least one of the
rim elements is axially movable with respect to the second
rotational axis, wherein the first rim element is separated from
the second rim element in an assembly position. In particular, the
first rim element can be shifted by the second rim element, and/or
the second rim element by the first rim element, as far in the
axial direction, so that preferably the vehicle tire can be
positioned between the two rim elements. In particular, the first
rim element can be shifted in the axial direction relatively to the
second rim element, whereby preferably the second rim element is
fixedly-connected with the measurement spindle and is therefore
especially fixed in the axial direction. In particular and in the
mounting position, the vehicle tires are positioned between the two
rim elements, coaxially in reference to the second rotational
axis.
[0018] In a preferred, constructive implementation, the receiving
device has a rim width adjustment device, wherein the rim width
adjustment device alters the rim width of the receiving device. The
rim width adjustment device, in particular, functions to reduce or
enlarge an outer diameter of the two rim elements, so that,
preferably, vehicle tires of different sizes can be received in the
receiving device, especially preferably without an exchange of the
rim elements. In particular, a rim width adjustment device can be
driven hydraulically and/or pneumatically. For instance, the rim
width adjustment device has a drive motor, preferably an
electro-motor. In particular, the rim width adjustment device
adjusts the first and/or the second rim element in the radial
direction in reference to the second rotational axis. In
particular, the adjustment range of the outer diameter is at least
13'', preferably more than 17'', especially preferred more than
21'', in particular more than 25''. Alternatively, or optionally as
an addition, is the adjustment range for the outer diameter of the
first and/or second rim elements, for a rim size of less than 40'',
preferably less than 23'', especially preferred with less than
19'', especially less than 15''.
[0019] In a further preferred embodiment of the invention, the test
measurement device has at least one force detection device, for
detecting the wheel vertical force. In particular, the at least one
force detection device has a force sensor, whereby the force sensor
is especially and preferably designed the detect the vertical wheel
force. In particular, the force sensor is piezo-electric and/or an
electro-magnetic and/or resistive load receiver. In particular, the
load sensor frictionlessly detects the vertical wheel force. In
particular, the force detection device is or can be connected with
the calculation processing device for signal transmission via a
cable or a wireless connection. The load detection device is
connected with the receiving device and/or the load device. In
particular, the force detection device is connected with the
measuring spindle and/or additional components of the receiving
device, for instance with the first and/or the second rim element.
Alternatively and optionally, the load detection device can also be
connected with the load roller.
[0020] In an alternative or optionally further embodiment, the
measurement device has at least an additional load detecting device
to detect tangential forces. In particular, the at least one,
additional load detecting device has a force sensor. In particular,
the force sensor is a piezo-electric and/or electro-magnetic and/or
a resistive force detector. In particular, the further load
detecting device is, in particular, connected or can be connected,
through cables or wirelessly with the evaluation device for signal
transfer. In particular, the evaluation device calculates the
rolling resistance of the vehicle tire from the detected vertical
tire force and/or the tangential force values. The additional force
detecting device is connected with the receiving device and/or the
load device. As an alternative, the at least one and the additional
force detecting devices form a common force detecting device, so
that preferably the common force detecting device is designed to
detect the vertical wheel force and the tangential force, wherein
especially preferred, the common force detecting device is
connected with the receiving device and/or load device.
[0021] In an alternative or optionally supplementary embodiment,
the measuring device has at least one further force detection
device for detecting tangential force. In particular, the force
detection device has at least a torque sensor. Preferably, the
torque sensor is a piezo-electric or magnetic or optical or a
resistive sensor. In particular, the torque detecting device is
connected or can be connected via cables or wirelessly with the
evaluation device for signal transmission. The torque detecting
device is connected with the receiving device and/or load device.
In particular, the at least one drive device and/or load roller
and/or the receiving device preferably the measurement spindle, has
the torque detection device to detect the drive torque or torque,
respectively, caused by the rolling resistance.
[0022] In a further development of the invention, the measuring
device in each case has a drive device for driving the load roller
and the receiving device. In particular, the first drive device is
gear-wise connected with the load roller and a second drive device
is gear-wise connected with the receiving device, preferably the
measuring spindle. In particular, the rotational movement takes
place in the rotational direction of the two drive devices, in
particular the load roller and the vehicle tire, either in parallel
or opposite to each other.
[0023] In a further preferred structural implementation, the
measurement device has at least one adjusting device, wherein the
adjusting device tilts the second rotational axis relative to the
first rotational axis. Alternatively or in addition, the measuring
device may comprise at least one further adjusting device, wherein
the further adjusting device tilts the first rotational axis
relative to the second rotational axis. The adjusting device
functions in particular to simulate a fall of the vehicle tire, so
that preferably the vehicle tire can be tested with different load
points. In particular, the adjusting device is an additional drive
motor and alternatively the adjusting device and the rim width
adjustment device are driven by a common drive motor. In
particular, the adjusting device readjusts the measurement spindle
and/or the receiving device so that preferably the second
rotational axis tilts relative to the first rotational axis. In
particular, the second rotational axis can be positioned as skewed
or as parallel to the first rotational axis, or bisects the second
rotational axis. Alternatively or as an option, the load device,
preferably the load roller, can be tilted so that the first
rotational axis is tilted relative to the second rotational axis.
Preferably, the adjusting device and/or the rim width actuator unit
and/or the second drive device are a common drive unit.
[0024] In a further embodiment of the invention, the measuring
device has an assembly device. In particular the assembly device
has the function of receiving one of the two rim elements,
preferably the first rim element, and so that it can be shifted in
the axial direction. In addition, the assembly device locks, in
particular, the two rim elements with each other, so that the
measurement rim is preferably formed and the vehicle tire is
particularly preferably received between the two rim elements. The
assembly device has for instance an assembly slider wherein the
assembly slider is guided in particular on a track. In particular,
the assembly device is operated electrically and/or pneumatically
and/or hydraulically. The at least one track is, particularly
preferred, positioned parallel to the second rotational axis.
[0025] The assembly device has an actuating module, and whereby the
actuating module is designed to lock the rim system. In particular,
the actuating module is connected with the assembly slider. In
particular, the actuating module accommodates, in a first step, the
first rim element so that the first rim element is preferably
connected with the actuating module. In a second assembly step, the
assembly device lifts, in particular, the first rim element in the
axial direction of the second rim element and/or from the vehicle
tire so that, preferably, the tool rim elements are distanced from
each other. In a third assembly step and in particular, an
additional vehicle tire, which needs to be tested, is positioned
coaxially in reference to the second rotational axis between the
two rim elements. In a fourth assembly step, the assembly device
moves, in particular, the first rim element, again in an axial
direction in reference to the second rotational axis, in the
direction of the second rim element, so that a bottom part of the
vehicle tire makes contact with the second rim element, and a top
side of the vehicle tire makes contact with the first rim element.
Especially preferred, the actuating module locks the two rim halves
with each other so that the vehicle tire is fixed, and/or
form-locked, and/or friction-locked connected with the tool rim
elements and that, in particular, the assembly process is
completed.
[0026] In a further embodiment of the invention, the assembly
device has at least one bead breaking module for the separation of
the tire from the first or the second rim element. The bead
breaking module is in particular connected with the assembly
slider. Preferably, the bead breaking module has at least a stamp,
and whereby the stamp preferably generates a force, in the axial
direction with reference to the second rotational axis, at the tire
sidewall so that the vehicle tire is especially separated from the
first rim element. As an added option, the assembly device has an
additional bead breaking module with at least an additional stamp,
whereby the bead breaking module injects in particular at the
opposite tire wall a force, whereby preferably the two bead
breaking modules are positioned in parallel and opposite to each
other, and can be activated preferably simultaneously.
[0027] In a preferred development, the receiving device has a
filling unit for filling the vehicle tire with compressed air. In
particular, the filling unit fills the vehicle tire, after the
placement of the vehicle tire between the two rim elements, with
compressed air. For instance, a tire pressure is at least 1 bar,
preferably more than 2 bar, especially preferred more than 5 bar,
and especially more than 10 bar. Alternatively or optionally in
addition, the tire pressure is in particular less than 20 bar,
preferably less than 8 bar, especially preferred less than 4 bar,
especially less than 1 bar.
[0028] In a further preferred development, the filling unit has a
control module to control the air pressure during the test process
of the vehicle tire. In particular, the control module is designed
for the monitoring of the air pressure and/or the control of the
filling unit. In particular, the control module creates a constant
air pressure during the duration of the test process so that
preferably, in case of pressure loss, the air pressure can be
re-adjusted.
[0029] In a structural embodiment, the load device has a load
slider, wherein the load roller has a pivoted bearing on the load
slider. In particular, the load slider has an axle on which the
load roller is preferably mounted. The axle is positioned in
particular on the first rotational axis and is preferably connected
with the drive device. In particular the load roller is firmly
connected with the axle, wherein the axle itself is connected with
a shaft of the drive device. The load slider can be shifted within
a shift direction. In particular, the shift direction runs in the
direction of the receiving device and/or into an opposite
direction. In particular, the load slider is positioned on at least
one guiding element, for instance a track. Preferably, the load
slider is slidably mounted on exactly two guiding elements, whereby
the two guiding elements are, for instance, two spaced parallel
tracks. Preferably, the load slider can be displaced by an
additional drive device, for instance a spindle drive, in a sliding
direction, wherein the sliding direction is preferably in the
direction of the receiving device and in an opposite direction.
[0030] In a further embodiment, the measurement device has a tire
storage device to accommodate at least an additional vehicle tire,
wherein the higher storage device forms a bottom stall for
additional vehicle tires. In particular, the tire storage device
serves as timely limited storage of at least one vehicle tire, so
that at least one vehicle tire is in the storage, simultaneously to
an additional vehicle tire which is, for instance, being tested,
and can be in particular prepared for the test process. In
particular, the higher storage device is designed to accommodate at
least one tire, preferably more than two, especially preferred more
than four, especially more than eight tires. However, especially
preferred is a design of the tire storage device for exactly four
vehicle tires.
[0031] In a further design, the measurement device has an input
interface and an output interface, wherein the input interface is
designed for the loading of at least one vehicle tire and the
output interface is designed for the ejection of the at least one
vehicle tire. In particular, the input interface and/or the output
interface are connected with additional systems of the
manufacturing line and/or assembly line. The measurement device is
designed for a fully automatic and/or automated test of the at
least one vehicle tire between the input and output interface. In
particular, the test device is loaded automatically with the
vehicle tire and the test process is fully-automatically or
automatically performed.
[0032] In an optional embodiment, the measurement device has a
pre-centering device for the defined positioning of at least one
vehicle tire. In particular, the pre-centering device functions to
bring the vehicle tire first into a defined position so that the
vehicle tire is preferably positioned in an ideal place or
additional process steps. In particular the positioning takes place
fully automatic and/or automatically and/or simultaneously to the
test process of an additional vehicle tire.
[0033] Alternatively or as an optional addition, the measurement
device has a soaping device for wetting the tire bead with a soap
solution. In particular, the soaping device functions to prepare
the vehicle tire in a way so that mounting of the vehicle tire with
the receiving device takes place by reducing the friction, wherein,
in particular, damage of the vehicle tire is reduced. In
particular, the wetting takes place fully-automatically and/or
automatically and/or simultaneously to the testing process of an
additional vehicle tire and/or the positioning of an additional
vehicle tire.
[0034] The pre-centering device and/or the soaping device are
positioned between the input interface and the output interface. In
particular, the pre-centering device is positioned in front of the
soaping device, wherein the pre-centering device preferably loads
the soaping device automatically with the prior adjusted vehicle
tire. Especially preferred is the testing device positioned after
the soaping device, whereby the soaping device preferably loads the
measuring device automatically with the previously treated vehicle
tire.
[0035] In an additional preferred designed, the measurement device
has at least a conveyor device for the transport of the vehicle
tire. In particular, the conveyor device has the function to convey
at least one vehicle tire automatically in a conveyor device. In
particular, the tire storage device has at least one, preferably
two conveyor devices, and/or the pre-centering device at least one,
and/or the soaping device at least one, and/or the measurement
device at least one conveyor device. In particular, the respective
conveyor devices are connected with each other and/or can be
connected. Especially preferred is the design of the conveyor
device of the tire storage device and/or the pre-centering device
and/or the soaping device and/or the measurement device form a
common conveyor device. Especially preferred, the conveyor device
can be vertically adjusted so that the height of a conveyor device
modified. In particular, the conveyor device has at least a
conveyor belt, preferably two conveyor belts in parallel to each
other. In particular, the conveyor device of the measuring device
is adjustable in the vertical direction so that preferably the
vehicle tire can be positioned in the axial direction in reference
to the second rotational axis. Especially preferred are a placement
and/or lifting of the vehicle tire by means of the conveyor device
on the first and/or second rim element.
[0036] The input interface and the output interface are connected
with each other by the conveyor device. In particular, the transfer
of the at least one vehicle tire takes place fully automatically
and/or automatically in the direction of transport. In particular,
the transport takes place from the input interface through the tire
storage device and/or through the pre-centering device and/or
through the soaping device and/or through the measuring device to
the output interface, wherein preferably the sequence relates to
the direction of transport. For instance, an additional conveyor
device is connected with the input interface and a second conveyor
device is connected with the output interface so that, in
particular, the vehicle tire can be fully automatically brought to
additional processes and pledged or additional systems.
Alternatively, the input interface and the output interface are
connected with additional conveyor devices so that a closed loop of
the vehicle tire can be realized.
[0037] In an additional output location, the input interface is
created through the tire storage device and/or the output interface
through the measurement device or the conveyor device. In
particular, the at least one conveyor device of the tire storage
device establishes the input interface. In particular, the conveyor
device of the measuring device establishes the output interface.
Alternatively a conveyor device which is connected with the
measurement device establishes the output interface.
[0038] In an additional, preferred realization of the invention,
the measurement device has a test chamber. In particular, after
finishing the test process or rolling resistance measurement of the
vehicle tire, the test tire is conveyed out of the test chamber and
moved to the output interface, and simultaneously or with an
offset, a new tire is transported to the input interface. In
particular, the test chamber is a test cabin or a building room,
for instance an industrial hall. In particular, the test chamber is
designed for the reception of at least one, preferably more than
three, most preferred of more than six, especially exactly seven
vehicle tires.
[0039] Also, the test system has a temperature adjustment device.
In particular, the temperature adjustment device is a temperature
controller which preferably, due to the captured temperature value,
automatically regulates a set temperature value.
[0040] The tire storage device and/or the pre-centering device
and/or the soaping device and/or the measurement device are located
in the test chamber. In particular, the tire storage device and/or
the pre-centering device and/or the soaping device and/or the
measurement device create a test station structure, whereby
preferably the input interface and the output interface, especially
preferred the higher storage device and/or the pre-centering device
and/or the soaping device and/or the measurement device are at
least connected through a conveyor device. In particular, the test
station structure creates a tire conditioning path, whereby the
test chamber is preferably positioned in the test chamber. In
particular and in addition to the actually tested vehicle tire, the
test chamber offers room or six additional tires so that it is
preferably assured, during a test cycle of half an hour that each
tire has been tempered in accordance with ISO 28580 for three hours
before the measurement of the rolling resistance.
[0041] The temperature of the test chamber can be adjusted by the
temperature adjustment device. In particular, the test chamber is
thermally sealed so that preferably a constant temperature exists
in the test chamber. In particular, the temperature is at least
15.degree. C., preferably more than 20.degree. C., especially
preferred more than 35.degree. C., and especially more than
45.degree. C. Alternatively or as an optional addition, the
temperature it is less than 60.degree. C., preferably less than
40.degree. C., especially preferred less than 30.degree. C., and
especially less than 25.degree. C. The temperature, especially
preferred, corresponds however with the requirements of the ISO
28580.
BRIEF DESCRIPTION OF THE DRAWINGS
[0042] Additional characteristics, and advantages, and impacts of
the invention can be seen in the following description of preferred
embodiments of the invention. Shown hereby:
[0043] FIG. 1 a perspective view of a test station configuration
has an embodiment example of the invention;
[0044] FIG. 2 a tire storage device of the test station in the same
presentation as in FIG. 1;
[0045] FIG. 3 a pre-centering device and a soaping device of the
test station and an assembly device of a measurement device of the
test station in a same presentation as in FIG. 1;
[0046] FIG. 4 a perspective view of a receiving device and a load
device of the measurement device of the test station;
[0047] FIG. 5 a top view of the test station with the test storage,
the pre-centering, the soaping, and the measuring device;
[0048] FIG. 6 a perspective view of a complete test system with a
test chamber and an operating device;
[0049] FIG. 7 a longitudinal section cut through the test chamber
where the test chamber is shown in a perspective view.
[0050] Correlating or same parts are identified with the same
reference characters in the drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0051] FIG. 1 shows in a perspective presentation a test station 1,
comprising a tire storage device 2, a pre-centering device 4, a
soaping device 5, and a measurement device 6. The tire storage
device 2 has a first and a second conveyor device 3a, 3b. The tire
storage device 2 is, for instance, designed to accommodate four
vehicle tires, whereby two vehicle tires are positioned and/or can
be positioned on the first conveyor device 3a and two vehicle tires
on the second conveyor device 3b. Thus, the tire storage device 2
serves as the storage for the vehicle tires to be tested.
[0052] Following the tire storage device 2 is the pre-centering
device 4, wherein the pre-centering device 4 has a third conveyor
device 3c. The pre-centering device 4 is designed to accommodate an
additional vehicle tire, preferably a fifth vehicle tire. As an
example, the first or the second conveyor device 3a, 3b transports
one of the vehicle tires in the direction of the pre-centering
device 4, whereby the third conveyor device 3c accommodates the
vehicle tire and whereby the vehicle tire is brought to a defined
position in the pre-centering device 4.
[0053] The pre-centering device 4 is followed by the soaping device
5. The soaping device 5 and the measurement device 6 have a fourth
conveyor device 3d, whereby the fourth conveyor device 3d creates a
common conveyor device. The soaping device 5 is designed to
accommodate an additional vehicle tire, preferably a sixth vehicle
tire. The third conveyor device 3c transports one of the vehicle
tires in the direction of the soaping device 5, wherein the fourth
conveyor device 3d takes the vehicle tire of the pre-centering
device 4. The vehicle tire, for instance its tire bead or the tire
inside, are wetted in the soaping device 5 with a soap
solution.
[0054] The soaping device 5 is followed by the measuring device 6.
The measuring device 6 is designed for the accommodation of an
additional vehicle tire, preferably of a seventh vehicle tire. The
fourth conveyor device 3d transports one of the vehicle tires in
the direction of the measuring device 6. The measuring device 6
comprises a load device 7, a receiving device 12, and an assembly
device 11.
[0055] The load device 7 has a load roller 8, whereby the load
roller 8 has a pivoted bearing in a load slider 9. Furthermore, the
measurement device 6 has a first drive device 10a. The first drive
device 10a, for instance an electric motor, is gear-wise connected
with the load roller 8. The first drive device 10a transfers for
instance a torque to the load roller 8, so that the load roller 8
is rotationally moved. The load roller 8 has a first rotational
axis R1, wherein for instance a shaft of the first drive device 10a
is positioned coaxial in reference to the load roller 8 on the
first rotational axis R1, and is connected in a rotationally fixed
manner with the load roller 8. In particular, the load roller 8 is
rotationally moved by the first drive device 10a in a circular
direction with respect to the first rotational axis R1.
[0056] The receiving device 12 defines a second rotational axis R2,
wherein the assembly device 11 is coaxially positioned with respect
to the second rotational axis R2. The receiving device 12 receives
one of the vehicle tires whereby the reception takes place fully
automatically. The assembly device 11 can be shifted axially
relative to the rotational axis R2. The assembly device 11 locks or
unlocks, respectively, the receiving device 12, so that a vehicle
tire can be received or also ejected, respectively.
[0057] FIG. 2 shows in a perspective presentation the tire storage
device 2 with the first and the second conveyor device 3a, 3b. The
first and the second conveyor device 3a, 3b are each formed with
two parallel, spaced conveyor belts 14, for instance belt conveyor.
The belt conveyors 14 have, for example for a better adhesion of a
conveyed article, on its outer side a profile, for example bars. In
the shown presentation, the first conveyor device 3a has a first
and a second tire 13a, 13b. The second conveyor device has a third
and a fourth tire 13c, 13d, whereby the tires 13a. 13b, 13c, 13d
are schematically shown.
[0058] Also, the tire storage device 2 has an adjustment device 15.
The first and the second conveyor device 3a and 3b are fixed and/or
firmly bonded and/or traction-fixed connected with the adjustment
device 15. The adjustment device 15 is formed by a plate, wherein
the two conveyor devices 3a, 3b are mounted parallel and at a
distance from each other at the plate. The adjustment device 15 can
be vertically adjusted by two track modules 16 that are distanced
from each other. As shown in FIG. 1, the tire storage device 2 is
followed by the pre-centering device 4, wherein either the first of
the second conveyor device 3a, 3b can load the pre-centering device
4. As required, the two conveyor devices 3a, 3b are adjusted by
means of the adjustment device 15 in the vertical direction so that
a respective loading of the pre-centering device 4 takes place.
[0059] FIG. 3 shows in a perspective presentation the pre-centering
device 4, the soaping device 5, and the assembly device 11. The
third and the fourth conveyor device 3c, d are each formed, as
already described in FIG. 2, again by two conveyor belts 14. The
pre-centering device 4 has a fifth tire, only partially shown. The
fifth tire 13e is being adjusted in the pre-centering device 4 for
an additional process through the soaping device 5. The fourth
conveyor device 3d can be vertically adjusted by an additional
adjustment device so that the fourth conveyor device 3d can be
adjusted to the same height as the pre-centering device 4 or the
conveyor device 3c, respectively.
[0060] The soaping device 5 has a sixth tire 13f which is
pre-conditioned by the soaping device 5 for the measurement device
6, so that for instance mounting the tire in the following test
process at the receiving device 12 is made easier and thus, the
material stress on the tire is reduced. The fourth conveyor device
3d has a seventh tire 13g. The seventh tire 13g, as shown in FIG.
1, is fully automatically received by the receiving device 12 and
thereafter the rolling resistance measurement is processed. The
assembly device 11 is positioned on the assembly slider 17 wherein
the assembly slider 17 can be adjusted by means of an additional
track module in the vertical direction, so that the assembly device
11, as shown in FIG. 1, axially to the second rotational axis R2
can be arbitrarily positioned. In addition, the assembly device 11
has an actuating module 18 and a bead breaking module 19. The
actuating module 18 locks the receiving device 12 when, for
instance, the seventh tire 13g is accommodated in the receiving
device 12. For instance, the bead breaking module 19 is designed as
a stamp which creates a force at the vehicle tire, for instance the
tire flank, in the axial direction in reference to the second
rotational axis R2. For example, the vehicle tire is pushed off at
the same time as the assembly slider 17 pushes the first rim
element 20a away from the second rim element 20b in the axial
direction.
[0061] FIG. 4 shows in a perspective presentation the receiving
device 12 and the load device 7 of the measurement device 6. The
receiving device 12 has a first and a second rim element 20a, 20b,
for instance two rim halves, whereby the two rim elements 20a, 20b
create a split rim engagement system. The two rim elements 20a, 20b
are pivoted coaxially to each other in reference to the second
rotational axis R2. The two rim elements 20a, 20b can be separated
from each other so that the vehicle tires can be positioned between
the two rim elements 20a, 20b.
[0062] Hereby, the actuating module 18, as in FIG. 3, accommodates
the first rim element 20a. The assembly slider 17 moves the first
rim element 20a axially away from the second rim element 20b, so
that the two rim elements 20a, 20b are distanced from each other.
Thereafter, by means of the fourth conveyor device 3d, see FIG. 3,
a vehicle tire is transported in the direction of the second
rotational axis R2, so that the tire is positioned coaxially to the
second rotational axis R2. Thereafter, the fourth conveyor device
3d is vertically adjusted so that a bottom side of the vehicle tire
rests on the second rim element 20b. The assembly slider 17 moves
the actuating module 18 with the first rim element 20a in the
direction of the vehicle tire, so that the first rim element 20a
rests on a top side of the vehicle tire. The actuating module 18
locks the two rim elements 20a, 20b with each other so that the
vehicle tire is positioned in a rotationally fixed manner between
the two rim elements 20a, 20b.
[0063] As an example, the receiving device 12 is designed to fill
the vehicle tire with air pressure so that a determined higher
pressure can be adjusted. After finishing the test process of the
vehicle tire, the two rim elements 20a, 20b are again separated
from each other whereby the bead breaking module 19 provides again
a force at the vehicle tire.
[0064] The receiving device 12 has a measuring spindle 21, wherein
the two rim elements 20a, 20b are positioned on the measuring
spindle 21. As an example, the lower rim element 20b is fixed with
the measuring spindle 21. The measurement device 6 has a second
drive device 10b and at least one positioning device 23. As an
example, the second drive device 10b and the positioning device 23
create a common drive device, for instance an electric motor.
Alternatively, a positioning device 23 is separately positioned in
reference to the second drive device 10b. The second drive device
10b is gear-wise connected with the measuring spindle 21. The
second drive device 10b transfers torque to the receiving device
12, so that for instance the vehicle tire is brought into a
rotation movement, with a rotation direction in reference to the
second rotational axis R2. For instance, the vehicle tire is
rotated in an opposite or same rotational direction and is the load
roller 8.
[0065] The positioning device 23 is connected with the measurement
spindle 21. For example, the positioning device 23 and/or the
second drive device 10b are designed for the tilting of the
receiving device 12 and/or for adjusting the rim width of the
receiving device 12 and/or for displacing the receiving device 12
in a rotation movement in the circumferential direction with
respect to the second rotational axis R2.
[0066] Alternatively, the measurement device 6 has at least an
additional positioning device, in particular exactly three
positioning devices. During tilting of the receiving device 12, the
positioning device 23 tilts the receiving device 12 with the
vehicle tire, particularly preferably the second rotational axis R2
with respect to the first rotational axis R1, so that a fall of the
vehicle tire is simulated. Upon adjustment of the rim width, the
adjustment device 23 changes the outer diameter of the two rim
elements 20a, 20b in the radial direction with respect to the
second rotational axis R2. It is now possible that the vehicle
tires with different sizes can be accepted through the receiving
device 12, without a required change of the rim elements 20a,
20b.
[0067] The measurement device 6 has at least a first and a second
force detection device 22a, 22b. The first force detection device
22a is connected with the measuring spindle 21 and the second force
detection device 22b is connected with the adjusting device 23. For
instance, both force detection devices 22a, 22b and a force sensor,
whereby the two force detection devices 22a, 22b are designed to
detect the vertical wheel force. The assembly slider 9 of the load
device 7 is positioned on at least one guiding module 24, for
instance two tracks that are parallel to each other, so that the
load device 7 or the load roller 8, respectively, can be moved in
the direction of the receiving device 12.
[0068] FIG. 5 shows a top view of the test station 1 with the tire
storage device 2, the pre-centering device 4, the soaping device 5,
and the measurement device 6. In FIG. 5, a vehicle tire 13 is
presented schematically in different positions. In particular, the
test station 1 defines a conveyor direction F, whereby the conveyor
direction F runs from the tire storage device 2 in the direction of
the measurement device 6.
[0069] In a first position, the vehicle tire 13 is accommodated by
a tire storage device 2 by means of the first of the second
conveyor device 3a, 3b and transported in the direction of the
pre-centering device 4. For example, the vehicle tire 13 remains in
each position for 0.5 hours until the change of the next position
occurs. Especially preferred, the vehicle tire 13 changes position
a total of three times within the tire storage device 2, so that it
results in a total holding time of two hours while the vehicle tire
13 is in the tire storage device 2.
[0070] Thereafter, the vehicle tire 13 is transferred into the
pre-centering device 4, whereby the vehicle tire 13 is accommodated
by the third conveyor device 3c and is brought into a defined
position. In total, the vehicle tire 13 remains for 0.5 hours in
the pre-centering device 4. Through the third conveyor device 3c,
the vehicle tire 13 is transport and in the direction of the
soaping device 5, whereby the vehicle tire 13 is accommodated by
the fourth conveyor device 3d.
[0071] In the load device 7, a pushing device S is activated
hydraulically and/or electrically and/or pneumatically. Movement in
the moving device S takes place, in the direction or opposite to
the vehicle tire 13 or the receiving device 12, respectively, by
the guiding modules 16. Hereby, the load device 7 is moved as far
and the direction of the vehicle tire 13 until the load roller 8
contacts the tire and/or a defined vertical tire force has been
reached, and the force is detected by the two force capturing
devices 22a, 22b, as shown in FIG. 4. In particular, for each
change of the position of the vehicle tire 13, a new tire is again
transported so that, for instance, a tire is always present in each
position. After finalizing the rolling resistance measurement, the
vehicle tire 13 is transported further in the conveyor direction F
and a new tire is loaded through the tire storage device 2.
[0072] FIG. 6 shows in a perspective presentation a complete test
system 25, whereby the test system 25 has a test chamber 26, for
instance test cell, for accommodating the test station 1. The test
system 25 has an operating device 27, whereby the operating device
27 is positioned at the outer side of the test chamber 26. For
example, the entire test system 25 can be controlled and monitored
via the operating device 27. Particularly preferred is the control
device 27 for controlling the test chamber temperature within the
test chamber 25. For example, a temperature sensor is positioned in
the test chamber 25 to capture the test chamber temperature. With
the operating device 27, a desired test chamber temperature, for
instance 25.degree. C., can be set.
[0073] FIG. 7 shows a longitudinal section through the test chamber
26 with the test system 1. The test chamber 26 has an input
interface 28a and an output interface 28b. The input interface 28a
and the output interface 28b are for instance each designed as an
opening at the outer wall of the test chamber 26. The input
interface 28a is formed by the tire storage device 2, for example
an additional system of an assembly and/or manufacturing line, has
a further output interface, wherein the further output interface is
connected to the input interface 28a. The output interface 28b is
formed by the measuring device 6, in particular by the third
conveyor device 3d, wherein for instance a further system for the
assembly and/or manufacturing line as an further input interface,
wherein the further input interface is connected to the output
interface 28b. The input interface 28a is connected with the output
interface 28b via the tire storage device 2, the pre-centering
device 4, the soaping device 5, and the measuring device 6, in
particular their conveyor devices, whereby the test system 25 is
designed for a fully automatic and/or automatic testing of at least
one vehicle tire 13 between the input and the output interface 28a,
28b.
REFERENCE CHARACTERS
[0074] 1 Test Station [0075] 2 Tire Storage Device [0076] 3a First
Conveyor Device [0077] 3b Second Conveyor Device [0078] 3c Third
Conveyor Device [0079] 4 Pre-Centering Device [0080] Soaping Device
[0081] 6 Measurement Device [0082] 7 Load Device [0083] 8 Load
roller [0084] 9 Load Slider [0085] 10a First Drive Device [0086]
10b Second Drive Device [0087] 11 Assembly Device [0088] 12
Receiving device [0089] 13 Vehicle Tire [0090] 13a First Tire
[0091] 13b Second Tire [0092] 13c Third Tire [0093] 13d Fourth Tire
[0094] 13e Fifth Tire [0095] 13f Sixth Tire [0096] 13g Seventh Tire
[0097] 14 Conveyor Belt [0098] Adjustment Device [0099] 16 Track
Module [0100] 17 Assembly Slider [0101] 18 Actuating module [0102]
19 Disconnect Module [0103] 20a First Rim Element [0104] 20b Second
Rim Element [0105] 21 Measuring Spindle [0106] 22a First Force
Capturing Device [0107] 22b Second Force Capturing Device [0108] 23
Positioning Device [0109] 24 Guiding Module [0110] Test System
[0111] 26 Test Chamber [0112] 27 Operating Device [0113] 28a Input
Interface [0114] 28b Output Interface [0115] R1 First Rotational
axis [0116] R2 Second Rotational axis [0117] F Conveyor Direction
[0118] S Pushing Device
* * * * *